A modular command line digital signal processor built in rust

Sam Andreae

Last update: Dec 15, 2022

Related tags

Audio and Music earwig

Overview

earwig

A modular command line digital signal processor built in rust. Ever wanted to pipe raw audio samples around in the terminal to impress your friends at a party? Well then, you've come to the right place. earwig is a collection of CLI audio processors which harness the power of stdin and stdout to send samples down the signal chain.

For example: ./choppy sample.wav | ./out

This would cut random chunks from sample.wav and pipe the samples to stdout for ./out to scoop up and output on the default audio device.

Why

Mainly because once I had the idea, I couldn't unthink it... Also I wanted to become more familiar with digital signal processing, especially in rust. And actually I think it might be a really fun music making tool.

Try it

cargo build
./target/debug/choppy | ./target/debug/out

Modules

choppy [sample_path] [sample_size_ms] Chop up some audio semi-randomly. Takes an audio file as input and continually chops it up in a semi-random way, pipes samples to stdout. Optionally takes a second arg setting the starting sample size.
out Audio output module. Slurps up samples from stdin and streams them as audible audio to the nearest output device.

Contribute

Yes please!! I don't know if two modules cam be considered a chain, so please contribute more. When doing so, bare in mind:

one module per file in src/
add a [[bin]] entry to Cargo.toml for your new module
modules should be fun.. This includes: pointless, "really??", plain noisy, "is it working?" and funky
lots of code comments please
keep on the simple side of the tracks where possible, fewer dependencies and transparent logic is prefered

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Comments

Meet smoothy

I have no idea what I am doing. It felt appropriate not to change anything about that until after submitting the PR.

How do you feel about adding dependencies? Using a VecDeque rather than a fixed-size ringbuffer hurts a bit.

opened by AljoschaMeyer 4
Slightly improve some modules

randomly sounds a lot better now, albeit still too white-noisy for my taste. Time to implement a module that adds small random values to samples rather than interpolating toward them soon.

opened by AljoschaMeyer 1
Explore using clap
This is what clap-based modules would look like. How do you feel about giving these more verbose usage instructions in the list of modules?

I will refactor everything to use clap before merging this after we settle on a style (for the readme in particular). Right now I've taken the output of extremely --help, removed the windows-specific bits, and removed the --help option.

Compilation time hasn't been noticeably affected by deriving Parser for just a single module.

For reference, here is the output of extremely --help on my machine:

$ ../target/debug/extremely --help Linearly interpolate each sample toward +/-1 Usage: extremely.exe [T] Arguments: [T] How strongly to interpolate samples toward +/- 1 [default: 1] Options: -h, --help Print help information
opened by AljoschaMeyer 1
Readme Format With Clap

Do you want to keep the short and informal list of modules, or should we switch to listing modules together with their module --help output after switching everything to using clap?

opened by AljoschaMeyer 2

Owner

Sam Andreae

GitHub

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